I had the same problem, and after some work out, i found solution. SG500 will show the route only if an interface which is assigned to the particular vlan is up. so either you make a port on that vlan and connect a pc or in the trunk port you add the vlan as allowed vlan (using "switchport trunk allowed vlan add <vlan> or all" command). It will resolve the issue.
Hope it will give solution to the people who searches for same problem.
Sx550X, Sx350X, Sx250: PSE will Supply Power to Catalyst PSE Ports
May 31, 2016
June 5, 2017
Configure Remote Network Monitoring (RMON) Events Control Settings on a Switch through the Command Line Interface (CLI)
Remote Network Monitoring (RMON) was developed by the Internet Engineering Task Force (IETF) to support...